Reinforcing means for concrete.



REINFORGING MEANS POR CONCRETE.

APPLICATION FILED DBO. 2o, 1909.

1,000,5 1 9. Patented Aug. 15, 1911.

made,

where ntersected by the axial plane 8 8, beA substantially undisturbed' by #deformation` y The purpose of this is to any-part of the bar deformed by the conjoint operation ofn-coperating rolls. In some es lof' barsheretofore attempted to be the entire surface of the bar has been in some degree.; 1* op osite rolls byl which the bar is .formed, to ave mating or intermeshin'g parts at adjacent4 ortions ott-he rolls; but whenever suchv o 1s become slightly offset, as is practically unavoidable, the mating. or intermeshing parts would cease to cooperate properly with the result that the bar would e incorrectly. rolled and uniformity lof cross-sectiona area would be destroyed. All such difliculties are avoided in the construction of the bar shown in the drawings in which adjacent parts of the rolls copcrate to forni only the undisturbed, preferably' rounded corners, intersected in Figs. 2 and 3 by the line 8 8. However the projections are disposed, itis preferred that the fulfil the .requirement above described that all ofthe deformations lying wholly at onel side of an axial plane, contribute uniformly to the cross-sectional area' of the bar.

As showin, the projections 5-5 and 6-'-6 have their greatest dimensions substantially parallel withthe length of the bar. While ythis is preferred it is not indispensable.

The form of shuttle-shaped projection i1lus trated is desirable both because of the'slight necessary distortionfof the fibers of the bar, and b ecause the orrning groove required to be made in the roll is'. very easy to make.

It is to be understood that this invention is 'not limited-to thespecificeinbodiment described above and shown in the drawings tor illustration; Onthe contrary the invention ma be variously embodied within the scope o the subjoined claims.

avoid lthe necessity 'for having distorted, requiring the two I income Claims. v 1. A-reinforcing bar having four faces anda single longitudinal row of separated rojections'on at least each of two adjacent ces the said projections being of less width "than the face of the .bar on which they are placed, the surface' of the bar between said projections being plane, the projections on one face being staggered in relation to those on the adjacent face and overlapping at such point longitudinally `oi the bar as to maintain a constant cross sectional area. 2. -A reinforcing bar of any uniform cross section having longitudinal rows of separated projections, the said rows being substantially ninety degrees apart around the circumference ot the bar and the width of each projection transversely of the bar being less than one quarter of the circumference of the bar, the projections in each row being staggered with relation to those in-an adjacent row and being so proportioned as to preserve a constant cross-sectional area and the surface of the barl between said projections' being lane. 3. A rein orcing bar of anyuniform section having longitudinal rows of separated projections, the said r l ws being substantially ninety degrees apar around the circumference of the bar and the width of each projection transversely of the bar being less than one quarter of the circumference of the bar, and the projections in each row being staggered with relation to those in an adjacent row and being so proportioned as topreserve a constant cross-sectional area.

In testimony whereof, I have signed my name thi specification, in the prsence of two suhscri ing witnesses."

lWitnsses:

Raynox C; RAFELsoN, W. H. POUCH.

y JOHN' E. HAVEMEYER. 

